Improvement in steam-generators



the line xx, Fig. 2.

UNITED STATES PATENT OEEICE.

ANDREW J. SMITH, oE GREENVILLE, OHIO.

IMPROVEMENT IN STE'AM-GENERATOR'S.

Specification forming part of Letters Patent No. 55,172, dated May 29,1866.

To all whom t may concern:

Be it known that I, ANDREW J. SMITH, of Greenville,in the county ofDarke and State of Ohio, have invented. a new and useful Iniprovement inSteam-Boilers 5 and I do hereby declare that the following is a full,clear, and exact description thereof, which will enable others skilledin the art to make and use the same, reference being had to theaccompanying drawings, forming a part-of this specification, in which-Figure lis a vertical longitudinal section of a portion ofmy im provedboiler, taken through Fig. 2 is a vertical crosssection ofthe same,taken through the line g/ y, Fig. l,

Similar letters of reference` indicate like parts.

My invention has forits'object to furnish an improved steam boiler inwhich the steam shall be formed in small quantities and as it may berequired for use; and itconsists of an improved steam-boiler formed bycombining the perforated interior boiler and the induction water-lupuswith each other and with the outer boiler, as hereinafter more fullydescribed.

A is the outer boiler, which is made in the same shape and manner as theouter case or shell of au ordinary steam-boiler, and the ends are alsoattached in the ordinarymanner. Within this boiler is placed a secondboiler, B. 'lhis boiler should be made of wroughtiron, and in the samegeneral form as the boiler A, but of such a size that it may be placedwithin the said boiler A leaving a space all `around between the saidboilers, as shown in Figs. 1 and 2. The boiler B is supported in thisposition by blocks C, through which pass bolts or rivets, which areriveted fast both to the boiler A and to the boiler B. The principalobject of this boiler B is to obtain a greater heating-surface, and itis perforated with numerousholes, as shown in the drawings, so that theheated air and steam inay have free passage through all parts of bothboilers.

The Water-induction pipe D enters through the top of the boilers, asshown, and after reaching the interior of the boiler B itis bent atright angles, and passes along within the said boiler B, as seen inFigs. 1 and 2.

To the under side of the horizontal part d of the pipe D is attached a'number of small cone-shaped pipes, E, the bottoms of which areperforated with numerous small holes, as shown.

F is the eduetion-lliipe, through which the steam is conveyed to theengine or other place where it is to be used. l

In using the boiler, the lire is first started, and as the boilersbecome heated the entire space within the boiler A becomes lilled withthe heated air. Water is then introduced, andv as it passes through thesmall holes in the bottoms of the cone-shaped pipes E it comes incontact with the heated air or steam within the boiler, and is at oncevaporized, the steam passing out through the pipe F, as before.

I claim as new and desire to secure bv Letters Patent- An improvedsteam-boiler formed by combining the perforated interior boiler, B, andthe water-induction pipe D ld E with each other and with the outerboiler, A, substantially as described, and for the purposes set forth.

ANDREW J. SMITH. Witnesses: f

THEoDoRE BEERs, FRANK E. MooREs.

